Setts



@eine gieten getest @frn JOHN lI. ABBOTT, OFlMALDEN, `AND JEREMIAH A. MARDEN, OF BOSTON, MASSACHU- SETTS, ASSIGNORS `TO JOHN I-I. ABBOTT AND CHARLES E. ABBOTT.

Letters Patent N0.75,823, elated M'aret 24, 1868.

VIMROVJSD LEATHER-SPLITTING MACHINE.

TO ALL WHOM IT MAY CONCERN:

Be it known that we, JonN H. Annorr, of Melden, Massachusetts, 'ond JnnnMIAH A. MARDEN, of the city nf Bost-on, Massachusetts, hnvc invented n new and improved Machine for Splitting Leather; and we do hereby declare the following to be a, full vend correct description of the'sfnne reference being bfi-d. to the accompanying i drawings, in whichv Figure 1 is a perspective View of the machine complete.

Figure 2 is ie vertical section of the feedfrollers und knifet-nnd Figure 3 is u. perspective view of the screw-clamp for holding the ends of the knife.

lThe some part is inerked by the some letter of reference Wherever it occurs.

This inventionV consists in the peculiar mode of attaching and operating the splitting-knife, by which the tension of the knife is preserved, and o. long reciprocating-.stroke is obtained.

To enable others Vto make end use our improved lenthersplittingmachine,we will proceed to describe more pnrticulerly its construction and: operation, referring to the drawings, on which A marks the frame of the machine; B, a. crank on the end of the mein lshaftgindiceting the. point ofV application of the driving-power.; C,.the mein shaft, hungin'journel-boxes nttachedtoithe freine. On either end of this shaft is n heart-shaped cani, D D, the apexes of which are set in voppositie* directions. The feces ofl these coins play in contact with the levers E E,which operate the splittngknife'."The lever EV is ,pivoted at dto the link F, which is pivoted to the end of the stud a, projecting frein the side oft-life 're'nleblt` is also p ivoted to 'the rod Gr, which is, piv oted to the end of stud b, projecting from the' frame. A)Thelevor E is hung, inA like manner, to the oppsite side of the machine. The object of hanging these' levers by npnrellel motion is to conse their free ends to rise nnd fell in n straight vertical line, instead of describing the are of' :i circle.

To the free ends of levers E E are attached the ends ofthe knife J, held in n screw-clamp, H, (see lig. There is nslot in either end of the knife J, through which passes the pin e of the clamp, which, projecting on either side of the clamp, forms its journals, which orereceived into notches inthe lower side ofthe ends of the levers. A deep mortise in the ends of the levers receives the clamp H, which is allowed sufficient ploy to keep the knife in line. The plates forming the clamp holdtheknife between them, and are held together by screws.

`These being loosened, the tension of the knife can be regulated at will, and held at any desired amount by tightening tho screws, the slot in the knife-ends allowing of the requisite yYnoveinent of the knife. The knife, which is formed of ln long, thin strip of flexible steel plate, passes over rollers K K', attachedto-the frame by brackets f. It works in n slit in a long guide, L, seen in cross-section in fig. 2. i

Rollers M N, driven in anyY suitable manner, receive between them and impel the leather P, to be operated upon, and present it for the notion of the knife. We arrange the throw ofthe levers E E so as te give to the knife n stroke equal in length to the 'length of the feed-rollers M N. 4

`Hoving thus fully describedl our invention, what we claim, and desiretosecure by Letters Potent, is-

1. Operating the knife of n leather-splitting machine by levers' drivenby coins, substantially in the manner set forth. i

2. The clamp Il, constructed and operating as described, to hold the end of the knife and assist thc ndjustp ment of its tension, es specified.

3. The combinetionrnnd arrangement of the coms D D', levers E E', clamp H, and knife J, in the manner and forthe purpose described.

The above specification of our said invention signed and witnessed nt Boston, this 19th dey of lDecember,

JOHN H. ABBOTT,

JEREMIAH A. MARDEN.

`Witnesses: v

CHARLES E. Anno'r'r, Guns. F. SrliNsnUnY. 

